Winter not going down without a fight this year.

Special Weather Statement

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ANCHORAGE AK
600 PM AKDT WED MAY 15 2013

AKZ101-111-121-145-161800-

...EXTREMELY UNUSUAL LATE-SEASON SNOWFALL POSSIBLE FRIDAY EVENING
THROUGH SATURDAY MORNING...

CONFIDENCE IS INCREASING THAT A VERY LATE-SEASON SURGE OF COLD AIR
WILL MOVE INTO SOUTHERN ALASKA ON FRIDAY. THE COLD AIR WILL INTERACT
WITH A LOW PRESSURE SYSTEM MOVING INTO THE GULF OF ALASKA CAUSING
RAIN TO CHANGE OVER TO SNOW FRIDAY AFTERNOON OR EVENING FROM THE
WESTERN KENAI PENINSULA TO ANCHORAGE AND THE MAT-SU.

THERE ARE QUITE A FEW UNCERTAINTIES WITH THIS STORM...INCLUDING THE
ARRIVAL TIME OF THE COLD AIR AND HOW INTENSE THE PRECIPITATION WILL
BE. THE INTENSITY OF SNOWFALL WILL BE THE KEY TO WHETHER SNOW
IS ABLE TO STICK TO THE GROUND AND ACCUMULATE.

CURRENT INDICATIONS ARE THAT THE HIGHEST LIKELIHOOD OF ACCUMULATING
SNOW WILL BE FRIDAY EVENING THROUGH EARLY SATURDAY MORNING. IT IS
TOO SOON TO FORECAST SNOWFALL AMOUNTS...BUT WE CAN SAY THAT THE
HIGHER ELEVATIONS OF ANCHORAGE AND THE MAT-SU (INCLUDING THE
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ANCHORAGE HILLSIDE) HAVE THE HIGHEST POTENTIAL FOR ACCUMULATING SNOW. GRASSY AREAS WILL BE THE FIRST TO SEE SNOW BEGIN TO ACCUMULATE...WITH PAVED SURFACES TAKING THE LONGEST TO COOL DOWN ENOUGH FOR SNOW TO STICK. THERE ARE ONLY TWO INSTANCES IN THE RECORD BOOKS WHERE MEASURABLE SNOWFALL WAS RECORDED IN ANCHORAGE (AT THE OFFICIAL CLIMATE STATION) DURING THE 2ND HALF OF MAY. THESE OCCURRED ON MAY 17 1989 AND MAY 22 1964. BOTH OF THESE STORMS DEPOSITED 0.2 INCHES OF SNOWFALL. THE UPCOMING STORM HAS A GOOD CHANCE OF PRODUCING THE LARGEST SNOWFALL IN THE 2ND HALF OF MAY SINCE RECORDS BEGAN IN 1917. ADDITIONALLY...IF ANY MEASURABLE SNOWFALL AT ALL OCCURS THIS WEEKEND IT WOULD MAKE THE 2012-2013 SNOW SEASON THE LONGEST SINCE RECORDS BEGAN. THE SNOW SEASON IS DEFINED AS THE NUMBER OF DAYS BETWEEN THE FIRST AND LAST MEASURABLE SNOWFALLS OF THE SEASON. THE CURRENT RECORD IS HELD BY THE 1981-1982 SNOW SEASON WHERE 230 DAYS ELAPSED BETWEEN THE FIRST AND LAST SNOWFALL. AS MENTIONED EARLIER THERE IS STILL QUITE A BIT OF UNCERTAINTY WITH THE DETAILS OF THE APPROACHING STORM. OUTDOOR ENTHUSIASTS SHOULD PREPARE FOR THE LATE SEASON COLD AND SNOW BEFORE HEADING OUT. PLEASE STAY TUNED TO THE LATEST NATIONAL WEATHER FORECASTS FOR THE MOST UP-TO-DATE INFORMATION ABOUT THIS UNUSUAL LATE SEASON EVENT.
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One Comment

  1. OK Let’s go for the record :) probably be another cool summer anyway, bring it on.